I used it on a bendy fiberglass pole and didn`t like it 1 bit,i then tried it on a shortish carbon pole and it worked better.If you get 1 you will need fan jets,it`s 15" wide and with 2 pencil jets your asking a lot to get and keep the bristles wet.Peter takes out almost a whole row of bristles in that brush and when you first look at it it looks as if he taken out far to many,having the fan jets turned up help it to glide over the glass better but it is more suited to bigger panes of glass.